This unattributed sculpture in Amsterdam is hiding in plain sight.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Real bones which are said to have belonged to a Polish dragon.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Macabre astrological automaton clock dating to the late 1400s.

A stone copper was sculpted on the wall of the Carlisle Cathedral to honor a local hero.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Looming communist pillar with a Czech twist.

This doorless 20th-century elevator doesn't stop or slow down.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A mocking tribute to the past and modern leadership of Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

The community pools that the community refused to give up on.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

An optical Illusion once believed to be an electrical phenomenon.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A locomotive made from 185,000 bricks celebrates the town's pioneering railway history.

Huge winged monument in the United Kingdom.